This is not true. C++ beats Java performance in constrained environments. On servers the situation is not so clear-cut. You see some really fast Java databases.
And BTW, Java is better at inlining functions than C++, but C++ handily beats Java when it comes to controlling memory layout (though that, too, is changing).
Every environment is constrained. Devs just got lazy and scaling now means buying more machines instead of performance optimisation.
> You see some really fast Java database
That eat up way to much memory for little.
When you see popular java based os , tell me.
Besides, all of the projects I've worked for has no FactoryFactories so let's cut that song right here right now.
HBase, Cassandra, VoltDB
"VoltDB mainly consists of Java modules for easier development. However, the core EE and its underlying on-memory storage system is implemented in C++. Nowadays Java and C++ have almost same performance for many cases, but C++ still outperforms Java on low-level memory accesses. This is why we have EE and its storage system written in C++."
I'm not sure this is a good argument.
Projects where performance is critical are coded in C/C++ , not in java ( browsers , AAA games , databases , servers , micro-controllers , oses... ). C/C++ programming is not about writing 'elegant' code with FactoryFactories , but performances. Even if it means using very basic data structures instead of classes or inlining functions everywhere.